Concrete mixture



H. J. SHAW CONCRETE MIXTURE July 5, 1932. Re. 18,511

Original Filed Aug 26, 1925 '2 Sheets-Sheet 1 H. J. SHAW CONCRETE MIXTURE July 5, 1932. R. 18,511

Original Filed Aug. 26, 1925 2 Sheets-Sheet 2 A TTIIIKNEY trollably rotated.

Reiuued July 5, 932

UNITED STATES PATEn OFFICE HARRY J. SHAW, OF TOLEDO, OHIO CONCRETE MIXTURE Original No. 1,615,315, dated January 25, 1927, Serial 1T0. 52,528, filed August, 1925. Application for reissue filed January 21,

This invention relates to transporting material to be agitated.

This invention has utility when lncorporated in a motor truck and rotatable 'container mounted thereon. to be carried and con- Beferring to the drawings; f

Fig. 1 is a side elevation, with parts broken away, showing an embodiment of the 1nven-.

tion in a motor truck with a rotatable cylindrical type of concrete mixer;

Fig. 2 is a view similar to Flg. 1, w1th parts broken away, showingmore clearly the details of control and operation;

Fig. 3 is a detail view of transmission connection from the transmission case for the concrete mixer; v

Fig. 4 is a rear elevation of the concrete mixer of Fig. 1, with the parts 1n dumping relation;

Fig. 5 is a rear View of the mixer 1n closed position;

Fig. 6 is a partial section of the mixer on the line VIVI, Fig. 4, showing the parts in dumpingposition;

Fig. 7 is a partial section on the hue VII 4 VII, Fig. 5, showing the closure for the rear discharge opening; and r Fig. 8 is a view of the lateral-closure for the concrete mixer.

Chassis or'body 1 is shown as having forward pair of wheels 2, as wheels directed or steered by steering wheel 3. This chassis 1 is also sustained by a second or rear pair of wheels 4 as the traction propulsion or driving wheels for the vehicle. Carried above the forward pair of wheels 2 and under hood 5 is motor 6 effective through transmission 7 for operating propeller shaft 8 in driving the pair of rear wheels 4 in propelling the vehicle. Lever 9 in cab 10 serves to determine the speeds desired in vehicle propulsion.

The transmission 7 has auxiliary housing 11 therefrom into which extends clutch lever 12 from the cab 10 effective for controlling transmission through speedreduction gear train 13 in the housing 11 for actuating rearwardly extending shaft 14 driving shaft 15' having pinions 16 in mesh with toothed bands 17 of cylindrical vessel or container 18 void filling fines,

1929. Serial No. 334,042.

and i g 22 into which chute 23 may d l"" liver coarse material 24 is heaping vrelation above water-lever 25. This water lever 25 in the container 18 is primarily to preclude adherence of cement to the interior of this vessel 18 and thus render cleaning and up-keep of the vessel or mixer more readily possible.

Upon this coarse material or broken stone 24 as heaped in the container 18 is dumped sand 26 isplaced the bulk cement coarse material is to an extent to hold or sustain the cement away from the water in the container 18. These materials are proportioned according to the desired batch for the concrete mixture. Such may be, for a fiveton truck, two cubic yards of stone; one cubic yard of sand; and one-half cubic yard of eement. This material as loosely dumped or heaped in the concrete mixer vessel 18 bulks for approximately three and one-half cubio' yards of loose material and heaps up above the axis of this vessel as rotated controllably from the cab 10.

This vessel 18 has on its inner walls spiral inwardly extending vanes 28 as flanges which may direct into lifting pockets or-flanges 29 near the rear end of the vessel 18. The vessel opening 22 issealed by closure 30 having ateral notches 31 into which swing bolts 32 may be shifted to have wing nuts 33 run up thereon for sealing this closure 30 with the vessel 18. Packing 34 is provided so that such sealing may be sufficiently tight to retain the mixture during the mixing operation as brought about by rotating the cylindrical vessel 18.

,This vessel 18 has, rearwardly, axial opening 35 which may be sealed by closure 36 carrying transversely extending arm 37 swingable to have wedge engagement with hooks '38. Centrally of this opening 35 extends as sand 26. Then upon such The .5

the supply yard or warehouse from overhead bins, the in edientsof the several respective materia s for thevbatch; This quantity may be hauled directlyto the job, as for a paving operation or building construction. It is to be noted inrthe rotation operations hereunder with the structure closed-there is not a change of atmosphere in-the container. This is a factor in retaining workability of the cement mixture. The power of the vehicle may be used in such case for transportation. In practice, the interval for mixing the ingredients is a relatively shorter time than the normal interval from a warehouse or yard to the region of the work where the mixture is to be delivered. Accordingly, it is not regularly contemplated to, operate the concrete mixer while the truck is in transit. However, with an adequate power plant in the truck or reduced road resistance, such may be done. As the vehicle reaches or approximates the region for use of the mixture, the operator of the vehiclejin the cab mat the operators station may pull haridle 43 thus opening valve 44 to-allow discharge of water by pipe 45.

' from tank 46 carried by the cab 10 andpartially over the forward end of the concrete imixer 18. With this supply of water up to the quantity desired for the batch to supplement the original wash water residue in the vessel 18, the operator may, through handle 12, effect the rotation of the batch of ingredients and water in the mixer 18. In practice, this may run for one or two minutes 01. the desired time interval.

As the mixing operation is completed, which operation may be at a slow rate of rotation, say -18 R. P. M'., a workman may knock the lever 37 clear of the wedge hooks 38.

The material in the vessel 18 being normally of a height to strike against this closure 36 and being so directed in the operation of the vessel 18 by the flanges 28, 29, this closure 30,

' as released, at once springs outward into the guide way. 42 so that the workman may, through handle 47, operate the chain 39 to bring the handle 47 to hook 48, thus lifting the closure 36 clear of the opening 35, allowing the material to flow by chute 49 for discharge upon the work, or in the desired position as in a conveyor.

' For fully emptying the concrete mixer 18, a supplemental device is disclosed which is normally clear of the mixer during the mixing operation. This device comprises frame 50 having crank wheel 51 connected by sprocket chain 52 with sprocket wheel 53 carrying-pinion 54 in mesh with segment 55 rigidwith auxiliary chute 56.'mounted in be'aring57 coaxial withthe segment'55. xThe operation of the crank wheel 51 brings about a shifting of this auxiliary chute 56 fromv crete as lifted by the flanges 28, 29, may fall upon this chute 56 and-thence be conducted placed in position and the wash water residue left in the reservoir or vessel 18 or this slight quantity of water introduced into the vessel 18.- The vessel is then stopped with the opening 22 upward and the truck is driven back to the source of material supply. The closure 30 is removedby turning back the wing nuts 33 and swinging these bolts out of the slots 31. As this closure 30 is removed, the batch proportions may be received in the vessel 18, while the tank 46 is given another supply of water. This cycle of operations maybe expeditiously completed with the result that a single manual handling or mechanical handling of the ingredients for the concrete mixture occurs, and at once the material starts from the warehouse or supply source, it goes directly into the work and there is no loss by improper proportions and there is additional economy in minimizing the labor expense, as well as speed in effecting the work.

It is to be noted as a factor of material value in this disclosure, that the truck is capable, under its motor, of normal truck 4 travel rate notwithstanding this structure includes therewith a concrete mixer. This means that in transporting the material to thelocation, such may be accomplished as expeditiously as under any other circumstances, the truck having a travel rate as perto the region of the work, deliverlng water to said mixture, efi'ecting agitation of the mixture and water on a horizontal axis of rotation extendin through the-heaping mixture to decrease t e gross bulk of said mixture by working the fines and cement into the voids of the coarse material as retained in said ile, and thereafter as a separate controlla le step from said agitation dischargingsaid agitated mixture.

2. The method of supplying a mixture to work comprising providing water at a level and of less than the required quantity for the mixture, dumping the coarse material into said water to protrude above the water, dumping fines on said coarse material, isolating water reacting material from said water by depositing on said fines, transporting the mixture to the region of the work, bringing the water content up to the required quantity, and as separate steps agitating, dumping, and washing out to leave a residue of water for repeating the c 'cle of operations.

3. The method of sugp y'ing a mixture to work comprising provi mg water to a level, dumping'coarse material into'said water to protrude above the water, dumping fines and water reacting material on said coarse material above the Water, transporting the mixture to the region of the work, a 'tating said mixture on a horizontal axis 0? rotation as extending through said material, as following said agitation disc'hargin mixture, and Washing out to leavea quantity of water for a repetition of the cycle of operations.

4. The. method of supplying a concrete mixture towork comprising dumping of a coarse material into a pile, depositing-fines on said coarse material, delivering said material and fines to the region of'the work, delivering water thereto, efl'ecting agitation thereof on a horizontal axis of rotation extending therethrough to decrease its gross a step bulk by workingthe'fines into the voids of the coarse material said agitation being independent of whether or not the material be in transit, and thereafter as a. separate controllable step from said agitation, discharging said agitated mixture. v

5. A transit concrete mixer comprising an auto truck, including the several wheels, the power plant, and drivers seat, a rotative mixing shell mounted on said truck, drive means operatively connecting said shell with the trucks power plant, a water tank carried by said truck and communicating with the in-.

located adjaterior of said shell, and means cent the drivers seat for admitting Water from said tank to the interior, of said shell. 6. A transit concrete mixer comprising an auto truck, including a chassis, drive and steering wheels therefor, the power plant and the drivers seat, a rotative mixing shell mounted on said truck, drive means including a clutch operatively connecting said shell with the trucks power plant, a water tank carried by'said truck and a conduit connecting said water tank with the interior of said shell, said. conduit including a portion disposed adjacent the drivers seat, a control valve in said portion and operable from the drivers seat, and means for controlling said clutch.

7 A transit concrete mixer comprising an auto truck, including a chassis, drive and steering wheels therefor, the power plant,

and the drivers seat, a mixing element mounted on said truck, drive means including a clutch operatively connecting said mixing element with the trucks power plant, and

means located adjacent the drivers seat for said opening, shell closing controlling said clutch, whereby operation of the mixing element may be controlled.

8. A transit concrete mixer comprising an auto truck, a cylindrical shell mounted thereon to rotate upon a horizontal axis and having an opening in a cylindrical wall for charging said shell, means for driving. said shell from the trucks power plant, said shell having a agitation of the material, fines and water on a horizontal axis of rotation to decrease the bulk thereof by working the fines into the voids of the coarse material, said agitation being independent of whether or not the material be in transit and thereafter as a separate controllable step from said agitation, discharging said agitated mixture. i

10. A transit concrete mixer comprising a vehicle providing a chassis, forward and rearward pairs of wheels supporting said chassis a closable ,and agitating transporting shell operatively mounted longitudinally upon a lateral charging said vehicle and having opening and a rearward discharging opening, means for closing said shell openings during :agitative and transporting periods, and control means effective whether or not the mixer be in transit for imparting agitative L movement to said shell, the interior walls of said shell embodying means for accelerating the agitative effect upon the concrete material adjacent the interior Wallin ai -common direction toward the discharge opening in one direction of shell rotation.

11. A transit concrete mixer comprising an auto truck, a shell rotatively mounted thereon for transporting and mixing concrete material, said shell having a discharging means at said opening, a Water tank carried. upon said communicating with the interior of said shell independently of through said closing means,

means for rotating said shell relatively to said tank, said shell having means effective upon said shell rotation to promote discharge at said opening, and control means for the rotating means independently of whether or not the mixer be in transit.

12. A transit concrete mixer auto truck provided with a drivers seat, a shell rotatably mounted on the truck for transporting and mixing concrete material, said shell having a discharging opening, shell closing means at said opening, water supply means for communicating with the shell interior independently of through said closing comprising an truck and means, driving for rotating said shell means, and

relative] to said water supply 2 y u said shell shell having means efiectiveu rotation to urge material ax1 closing means at closed 1 t1on, and controlling means for,the rlvmg, means for rotating the shell whether or not the mlxer be in transit, said water supply means being carried by said truck and controllable from the drivers seat, there being a connection between the shell and tank permitting relative movement therebetween.

13. A transit concrete mixer com a vehicle, chasis, a pair of forwar drlvmg wheels and a pair of rear propulsion wheels mounting the chassis, a concrete mixer disposed centrall above the rear pair of wheels a motor for t e vehicle and mixer disposed above the forward pair of wheels and space'd from the mixer, a cab having therein control mechanism for the vehicle and mixer for operating the mixer independently of prope ling the vehicle, said ca and mixer, a water tank mounted rearwardly of the cab and over the mixer, and a controllable discharge operable from the cab forthe tank into the mixer.

- 14. A transit concrete mlxer comprising a vehicle chassis, a pair of forward driving wheels and a pair of rear propulsion wheels mounting said ch a cylindrical concrete mixer disposed centr y above-the rear pair of wheels, a motor for the vehicle and mixer disposed above the forward pair of wheels and spaced from the mixer, a cab havlng therein control mechanism for the vehicle and for rotating the mixer independently of propelling the vehicle, a water tank mounted rearwardly of the cab and over the'mlxer, a discharge for the tank axially into the mixer, and control means for'sai discharge Ids operable from the cab. o 15. A transit concrete mixer compr sing a rotatable shell, bearing means PIOVldlllg a fixed horizontal axis for the shell, said shellbeing provided with a lateral charging opening having clearance radially through said shell for receiving material to be charged into the shell in'a volume extending along longitudinally into the axial region of the shell, a vehicle for carrying the shell, a mo-' tor mounted by the vehicle, a transmission from the motor, a driving shaft from the transmission for propelling the vehicle, a control for propelling the vehicle through said shaft, and controllable actuating means extending rearwardly from the motor for a rotating said shell, said shell having a teriminal discharge opening and said shell beingclosable wherebymixing of the concrete in the shell away from general change in atmosphere, said shell being open; iniorder that material may be discharged j from thoshell, said shell means pro-' tation.

y toward the abutting the motor moting said discharge during said shell io- 16. The 'method'of handling concrete mix: A I

ture comprising separating portions of ingredients for a concrete mixture assembling said ingredients in a batch by piling the material-of the batch upon itself, closing ofl the batch from general change in atmosphere, transporting the batch, rotating the batch on an axis abovevwhich-thebatch extends said axis being transverse the direction of said piling of the material into the batch and progressmg the material of the batch axially of its said rotation-in efiecting mixing thereof,

exposing the material to atmosphere, further rotating and progress' the ex d material and discharging t e material during said rotation by lifting successive ortions of the batch for. gravity action fo owing therefrom in movm downwardly and'forwardly, and controlfing said rotations independently of whether or not during transpor tin a separating portions of ingredients for a concrete mixture, assembling said ingredients to form a batch, closing ofi thebatch from general change in' atmos here, transporting the batch, rotating the etch, b

er or not during transporting, and pro' essin themathe material during said 'scliarge, and before repetition of said handling for a succeeding batch,"supplyin water to the container for said batch to e effective by such rotation for washing action whether or not during transportation, retaining said wash water in the container to be incorporated in a succeeding batch.

18. A transit concrete mixer comprising a tubular shell having a terminal discharge opening, there being means including a lateral opening for "charging concrete material into the shell in volume to extend above the axis of the shell and longitudinally thereof into an otherwise clear region about the axis of the shell, said shell in rotation having means effective for progressing the concrete material in the shell in a common direction toward the discharge opening of the shell in, one direction of shell rotation, a closure for the charging opening, a closure for the discharging opening in closed position ,for intercepting said material, there being means mounting the latter closure for shifting relatively to the shell to open position for the dischargingopening, and adrive for rotating the shell in transit or out of :transit to'efiect through said progressing means flow of conhe method of handlin concrete mixture-in asuccession of bat: es comprising 'terial of the batch ax'ially of'1tssai rotation 1 in effecting mixing thereof, intercepting the crete material from the shell to and through the discharging opening. i 19. A transit concrete mixer comprising a vehicle having a chassis, a concrete mixing shell on said chassis, said shell having a terminal discharge opening, there being means includin a lateral opening eflecting charging of the shell; above the axis of the shell longitudinally along the axis of the shell, a closure for the charging opening, an additional closurefor the discharging opening,

said closures cooperating for-closed shell mixing operation, there being releasing means from closed position of said charging closure whereby said charging closure may then be shifted relatively to the shell to open position for the opening, and 'a drive for rotating theshell on an axis longitudinally of the vehicle, said shell having means to efiect flow of the material from the shell at the discharging opening during said rotation.

20; A transit concrete mixer comprising a vehicle, horizontally disposed bearings extending rearwardly of the vehicle and carried thereby, a shell carried by the vehicle including mixing means mounted in said bearings, said shell having a lateral charging opening, a discharging opening, said discharging opening being rearwardly of the vehicle, a motor mounted b the vehicle, a transmission rea-rwardly, rom the motor, a drivers i seat on the vehicle, said shell being closable to retain a charge of the material in volume extendin along longitudinally in the axial region 0% the shell, and a control from the drivers seat for connecting the transmission for effecting rotation of the mixing means in said bearings, saidshell being openable and said shell having means in order that there may be effected discharge of mixed concrete from the shell to said discharge opening promoted by said rotation.

21. Atransit concrete mixer comprising a concrete mixing closed rotary shell having axially thereof a terminal discharge opening, and a lateral charging opening through which lateral opening there may be effected charging of the shell in a volume to extend above the axis of the shell longitudinally thereof into an otherwise clear region about the axis of the shell, a closure for the charging opening, an additional closure for the discharging opening cooperating with the shell when in closed position at the discharging openin even with t e shell at rest, said discharging opening closure being shiftable as to the shell for malntaining open position for the opening for material discharge, and a drive for rotating the shell, said shell having means thereby to efiect flow of the material in the shell toward said discharge end and from the shell at the discharging opening.

22. A transit concrete mixer comprising a vehicle providing a chassis, forward and to retain the charged material rearward pairs of wheels supporting said chassis, a closable and agitating transporting shell operatively mounted upon said vehicle and provided with a lateral charging opening having clearance radially through said shell, and spaced therefrom and independent of said lateral opening an axial discharging opening, means for closing said shell openings during agitative and transporting periods, and control means eflc'ective whether or not the mixer be in transit for imparting agitative movement to said shell, the interior walls of said shell embodying means for accelerating the agitative efl'ect upon the concrete material adjacent the interior wall in a common direction toward the discharge opening in one direction of shell rotation.

In witness whereof I aflix my signature.

" HARRY J. SHAW. 

